x^2-37x-84=0

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Solution for x^2-37x-84=0 equation:


Simplifying
x2 + -37x + -84 = 0

Reorder the terms:
-84 + -37x + x2 = 0

Solving
-84 + -37x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '84' to each side of the equation.
-84 + -37x + 84 + x2 = 0 + 84

Reorder the terms:
-84 + 84 + -37x + x2 = 0 + 84

Combine like terms: -84 + 84 = 0
0 + -37x + x2 = 0 + 84
-37x + x2 = 0 + 84

Combine like terms: 0 + 84 = 84
-37x + x2 = 84

The x term is -37x.  Take half its coefficient (-18.5).
Square it (342.25) and add it to both sides.

Add '342.25' to each side of the equation.
-37x + 342.25 + x2 = 84 + 342.25

Reorder the terms:
342.25 + -37x + x2 = 84 + 342.25

Combine like terms: 84 + 342.25 = 426.25
342.25 + -37x + x2 = 426.25

Factor a perfect square on the left side:
(x + -18.5)(x + -18.5) = 426.25

Calculate the square root of the right side: 20.645822822

Break this problem into two subproblems by setting 
(x + -18.5) equal to 20.645822822 and -20.645822822.

Subproblem 1

x + -18.5 = 20.645822822 Simplifying x + -18.5 = 20.645822822 Reorder the terms: -18.5 + x = 20.645822822 Solving -18.5 + x = 20.645822822 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18.5' to each side of the equation. -18.5 + 18.5 + x = 20.645822822 + 18.5 Combine like terms: -18.5 + 18.5 = 0.0 0.0 + x = 20.645822822 + 18.5 x = 20.645822822 + 18.5 Combine like terms: 20.645822822 + 18.5 = 39.145822822 x = 39.145822822 Simplifying x = 39.145822822

Subproblem 2

x + -18.5 = -20.645822822 Simplifying x + -18.5 = -20.645822822 Reorder the terms: -18.5 + x = -20.645822822 Solving -18.5 + x = -20.645822822 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18.5' to each side of the equation. -18.5 + 18.5 + x = -20.645822822 + 18.5 Combine like terms: -18.5 + 18.5 = 0.0 0.0 + x = -20.645822822 + 18.5 x = -20.645822822 + 18.5 Combine like terms: -20.645822822 + 18.5 = -2.145822822 x = -2.145822822 Simplifying x = -2.145822822

Solution

The solution to the problem is based on the solutions from the subproblems. x = {39.145822822, -2.145822822}

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